CA2584046C - Blade element mounting in a snow plough - Google Patents
Blade element mounting in a snow plough Download PDFInfo
- Publication number
- CA2584046C CA2584046C CA2584046A CA2584046A CA2584046C CA 2584046 C CA2584046 C CA 2584046C CA 2584046 A CA2584046 A CA 2584046A CA 2584046 A CA2584046 A CA 2584046A CA 2584046 C CA2584046 C CA 2584046C
- Authority
- CA
- Canada
- Prior art keywords
- colter
- fixed blade
- spring
- attached
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
- E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
- E01H5/061—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by scraper blades
- E01H5/062—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by scraper blades by scraper blades displaceable for shock-absorbing purposes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Soil Working Implements (AREA)
- Knives (AREA)
Abstract
Flexible suspension of colter element (1) of a snowplough furnished with a body (5), a blade (3) as its extension, colter element (1) that gets in contact with the surface to be ploughed, where for the colter element (1) a tilt suited for the purpose is arranged, a.o. a cutting angle. Colter element (1) is fitted to dodge an obstacle in its cutting angle by backing up, whereby the fixing arrangement of colter element (1) has an open space formed for moving plate (13) fitted as extension of the colter element, in which space said moving plate is arranged to glide, and the arrangement includes a spring organ (9) the spring impact of which is arranged to hinder the colter element from backing up.
Description
BLADE ELEMENT MOUNTING IN A SNOW PLOUGH
The invention relates to a flexible mounting of the colter element of a snowplough furnished with a colter element that gets in contact with the surface to be ploughed including a blade as its extension, by which suspension for the colter element a tilt, a.o. a cutting angle, suited for the purpose is arranged. When the snowplough is ploughing uneven ground the colter must adjust to the roughness of ground. The flexible colter material is not enough alone, but the suspension of the colter must also be flexible. The need of flexibility grows with the width of the snowplough and the demands of the plough cleanliness.
In using flexible colters of polyurethane or rubber the load of colter against the surface to be ploughed must be small, but the colter must stay in same colter angle during flexing. The smallness of vertical force pressing colter is important in order to minimize wear and tear of the colter and to lengthen the life of the colter. Right position keeps the cutting of colter edge sharp without rounding the lower surface. Rounding of colter lower surface makes of the cutting colter edge rise from the ground and snow getting under the colter lifts the colter to glide on the snow layer. The result is weakened ploughing quality.
Backing of colter in its direction against a spring is known for instance from publications DE 881200, GB 1060335, GB 784049. In these ones the colter element is a plate of large size, which must always be replaced as a whole, when sufficiently worn out. For the colter plate a quite long backward directed steering box portion is arranged, which keeps the colter in direction.
In using an additional colter, this colter must have same possibilities to follow the roughness of surface as the first colter.
Previously known is suspension of a colter, where the whole plough, for the part of " blade and colter, is divided into transverse elements, which are flexing vertically on levers or on flexible attachments. The disadvantage of this solution are the relatively heavy elements, which cause the colters a wearing load and hard strokes on obstacles by ploughing, because of the mass of elements. The moving of elements gives cause to discontinuity on blade surface and restricts blade forming. The circle curve is almost the only possible cross-cut of blade, if the motion is dimensioned to follow the curve. The direction of the evasive movement by means of lever mechanisms is in a relatively great angle in regard to the driving motion direction and thus disadvantageous.
Previously known is also a solution, where the mere colter is divided into separately suspended elements, which function simply steered by springs or separate elements, as GB 784049. There are wearing parts in the control mechanisms. Colters resting merely on springs have too great colter forces and often insufficient control, which lead to rapid wearing and blade bottom rounding. Known is also a solution, where the colter is suspended on springs of elastic rubber or of plastic.
The disadvantage of said solutions is weak control, whereby the colter wears out into wrong form. Another disadvantage appears bin speedy ploughing and the risk connected to overheating of spring material, and loss of spring material firmness due to inside frictions.
For suspension of an additional colter a further solution is known, where the additional colter is furnished with its own mechanisms both for the vertical and evasive backward motion of the colter. This is an expensive solution containing of many parts.
2a According to the present invention there is provided a snowplough having a body, a longitudinal colter and a flexible suspension which suspends the colter to the body such that the colter is in contact with the surface to be ploughed and is set into a titled cutting angle. A fixed blade is provided and is an upward extension of the colter. A
spring organ is detachably attached to the colter and backs up the colter to enable the colter to dodge an obstacle by backing up against the spring organ. A moving plate is attached to and extends the colter towards the blade. A cover plate is provided in front of the fixed blade and a mounting space is formed between the fixed blade and the cover plate, whereby the moving plate is fitted to glide in the mounting space back up towards the fixed blade and then back down.
The spring organ includes at least two U-shaped leaf springs. Each U-shaped leaf spring extends in a longitudinal direction along the colter and has a U-shape in cross section parallel to the cutting angle. One leg end of each U-shaped leaf spring is attached to the body and other leg end is attached to the colter such that the two U-shaped leaf springs work together essentially as straight-through mechanisms to back up the colter.
By means of the solution according to this invention most of the disturbances appearing by the colter suspension are avoided and the suspension according to this invention is characterized in that to the spring organ a detachable colter element is attached, as extension to witch a plate attached to the colter element is fitted, for which plate an open space is formed between the attached colter and a covering plate at a distance from it, whereby said moving plate is fitted to glide in the said open space.
The advantage of the suspension according to this invention is each colter element and that to it possibly connected additional colter is built as a flexible unit, which due to its flexible attachment gets with its both colters in contact against the surface. The additional colter can be fixed to the attachments of the colter, whereby the additional colter follows the colter motions. This approximate control is sufficient when both colters are flexible. The additional colter has a stabilizing extra impact on the actual colter. At the same time, the sequential colters give in the manner of the boggie each In the following the invention is disclosed with reference to the enclosed drawing, where Fig. 1 shows a snow plough viewed from the end.
Fig. 2 shows the sectional view 11-11 of the construction in figure 1.
Figure 1 shows a snowplough colter 1 furnished with body 5, height adjusting support wheel 6 and colter 1 including blade 3 as its extension. Colter 1 is of flexible material and is suspended from holders 8. There is in the body lower part a horizontal beam 2 in which the colter elements 1 and lower edge 4 of blade 3 are fixed.
As extension of colter 1 there is a moving plate 13,which can move between the surface of fixed blade 3 and cover plate 12. Colter 1 is attached to moving plate 13 and to the flexing lower end of spring organ 9. The upper end of spring organ 11 is attached to horizontal beam 2 by means of a distance piece 18.As spring there is a leaf spring bent The spring U-shape tends to open and by colter backing the U-shape tends to narrow, in other words fixing points 10 and 11 (figure 2) come closer to each other.
Figure 1 shows also an additional colter 15, which is by means of shaft 16, bent of spring steel, attached to colter 1.Thus the additional colter 15 flexes like colter 1 in the flexing direction of colter 1.
tend to open and press colter ldown. Stoppers 14 are connected to the end, which prevent colter 1 to get down only to a certain limit, even if spring 9 would tend to press the colter more dAward. By means of this stopper solution for the colter initial stress is achieved to prevent backing.. Thanks to the solution the springback factor of the spring remains almost unchangeable on a possible backing distance arranged for the colter. Between spring 9 lower fastening and colter 1 there can also be a damping piece 17.
The colter element is attached at least between the ends of two leaf springs 9 bent into U-shape and running in colter direction, while the other spring ends are attached to the plough body. U-shaped leaf springs function as rough straight-through mechanisms. The holding power in the direction of motion caused by bumpy surface is smallest and at its greatest in the direction that keeps the colter in right position. The arrangement presses the colter with a relatively small load against the surface being ploughed and at the same time keeps the colter steady in cutting position.
The advantage of prestressed spring suspension is the possibility of relatively small growth of the springback factor, while the spring route gets longer and at the same time for the colter an operating area is achieved at once after the limitation without any additional routes of motion, which would demand additional height for plough lifting, for instance in transporting position.
Advantageously the plough is formed of several colter elements side by side, which have separated flexing arrangements. Then only relatively small masses have to back up on hitting an obstacle. Even the ploughing result weakens only at the backed up colter.
Blade portion 3 can be continuous along the whole plough width.
The invention relates to a flexible mounting of the colter element of a snowplough furnished with a colter element that gets in contact with the surface to be ploughed including a blade as its extension, by which suspension for the colter element a tilt, a.o. a cutting angle, suited for the purpose is arranged. When the snowplough is ploughing uneven ground the colter must adjust to the roughness of ground. The flexible colter material is not enough alone, but the suspension of the colter must also be flexible. The need of flexibility grows with the width of the snowplough and the demands of the plough cleanliness.
In using flexible colters of polyurethane or rubber the load of colter against the surface to be ploughed must be small, but the colter must stay in same colter angle during flexing. The smallness of vertical force pressing colter is important in order to minimize wear and tear of the colter and to lengthen the life of the colter. Right position keeps the cutting of colter edge sharp without rounding the lower surface. Rounding of colter lower surface makes of the cutting colter edge rise from the ground and snow getting under the colter lifts the colter to glide on the snow layer. The result is weakened ploughing quality.
Backing of colter in its direction against a spring is known for instance from publications DE 881200, GB 1060335, GB 784049. In these ones the colter element is a plate of large size, which must always be replaced as a whole, when sufficiently worn out. For the colter plate a quite long backward directed steering box portion is arranged, which keeps the colter in direction.
In using an additional colter, this colter must have same possibilities to follow the roughness of surface as the first colter.
Previously known is suspension of a colter, where the whole plough, for the part of " blade and colter, is divided into transverse elements, which are flexing vertically on levers or on flexible attachments. The disadvantage of this solution are the relatively heavy elements, which cause the colters a wearing load and hard strokes on obstacles by ploughing, because of the mass of elements. The moving of elements gives cause to discontinuity on blade surface and restricts blade forming. The circle curve is almost the only possible cross-cut of blade, if the motion is dimensioned to follow the curve. The direction of the evasive movement by means of lever mechanisms is in a relatively great angle in regard to the driving motion direction and thus disadvantageous.
Previously known is also a solution, where the mere colter is divided into separately suspended elements, which function simply steered by springs or separate elements, as GB 784049. There are wearing parts in the control mechanisms. Colters resting merely on springs have too great colter forces and often insufficient control, which lead to rapid wearing and blade bottom rounding. Known is also a solution, where the colter is suspended on springs of elastic rubber or of plastic.
The disadvantage of said solutions is weak control, whereby the colter wears out into wrong form. Another disadvantage appears bin speedy ploughing and the risk connected to overheating of spring material, and loss of spring material firmness due to inside frictions.
For suspension of an additional colter a further solution is known, where the additional colter is furnished with its own mechanisms both for the vertical and evasive backward motion of the colter. This is an expensive solution containing of many parts.
2a According to the present invention there is provided a snowplough having a body, a longitudinal colter and a flexible suspension which suspends the colter to the body such that the colter is in contact with the surface to be ploughed and is set into a titled cutting angle. A fixed blade is provided and is an upward extension of the colter. A
spring organ is detachably attached to the colter and backs up the colter to enable the colter to dodge an obstacle by backing up against the spring organ. A moving plate is attached to and extends the colter towards the blade. A cover plate is provided in front of the fixed blade and a mounting space is formed between the fixed blade and the cover plate, whereby the moving plate is fitted to glide in the mounting space back up towards the fixed blade and then back down.
The spring organ includes at least two U-shaped leaf springs. Each U-shaped leaf spring extends in a longitudinal direction along the colter and has a U-shape in cross section parallel to the cutting angle. One leg end of each U-shaped leaf spring is attached to the body and other leg end is attached to the colter such that the two U-shaped leaf springs work together essentially as straight-through mechanisms to back up the colter.
By means of the solution according to this invention most of the disturbances appearing by the colter suspension are avoided and the suspension according to this invention is characterized in that to the spring organ a detachable colter element is attached, as extension to witch a plate attached to the colter element is fitted, for which plate an open space is formed between the attached colter and a covering plate at a distance from it, whereby said moving plate is fitted to glide in the said open space.
The advantage of the suspension according to this invention is each colter element and that to it possibly connected additional colter is built as a flexible unit, which due to its flexible attachment gets with its both colters in contact against the surface. The additional colter can be fixed to the attachments of the colter, whereby the additional colter follows the colter motions. This approximate control is sufficient when both colters are flexible. The additional colter has a stabilizing extra impact on the actual colter. At the same time, the sequential colters give in the manner of the boggie each In the following the invention is disclosed with reference to the enclosed drawing, where Fig. 1 shows a snow plough viewed from the end.
Fig. 2 shows the sectional view 11-11 of the construction in figure 1.
Figure 1 shows a snowplough colter 1 furnished with body 5, height adjusting support wheel 6 and colter 1 including blade 3 as its extension. Colter 1 is of flexible material and is suspended from holders 8. There is in the body lower part a horizontal beam 2 in which the colter elements 1 and lower edge 4 of blade 3 are fixed.
As extension of colter 1 there is a moving plate 13,which can move between the surface of fixed blade 3 and cover plate 12. Colter 1 is attached to moving plate 13 and to the flexing lower end of spring organ 9. The upper end of spring organ 11 is attached to horizontal beam 2 by means of a distance piece 18.As spring there is a leaf spring bent The spring U-shape tends to open and by colter backing the U-shape tends to narrow, in other words fixing points 10 and 11 (figure 2) come closer to each other.
Figure 1 shows also an additional colter 15, which is by means of shaft 16, bent of spring steel, attached to colter 1.Thus the additional colter 15 flexes like colter 1 in the flexing direction of colter 1.
tend to open and press colter ldown. Stoppers 14 are connected to the end, which prevent colter 1 to get down only to a certain limit, even if spring 9 would tend to press the colter more dAward. By means of this stopper solution for the colter initial stress is achieved to prevent backing.. Thanks to the solution the springback factor of the spring remains almost unchangeable on a possible backing distance arranged for the colter. Between spring 9 lower fastening and colter 1 there can also be a damping piece 17.
The colter element is attached at least between the ends of two leaf springs 9 bent into U-shape and running in colter direction, while the other spring ends are attached to the plough body. U-shaped leaf springs function as rough straight-through mechanisms. The holding power in the direction of motion caused by bumpy surface is smallest and at its greatest in the direction that keeps the colter in right position. The arrangement presses the colter with a relatively small load against the surface being ploughed and at the same time keeps the colter steady in cutting position.
The advantage of prestressed spring suspension is the possibility of relatively small growth of the springback factor, while the spring route gets longer and at the same time for the colter an operating area is achieved at once after the limitation without any additional routes of motion, which would demand additional height for plough lifting, for instance in transporting position.
Advantageously the plough is formed of several colter elements side by side, which have separated flexing arrangements. Then only relatively small masses have to back up on hitting an obstacle. Even the ploughing result weakens only at the backed up colter.
Blade portion 3 can be continuous along the whole plough width.
Claims (4)
1. A snowplough comprising:
a body;
a longitudinal colter;
a flexible suspension which suspends the colter to the body such that the colter is in contact with the surface to be ploughed and is set into a tilted cutting angle;
a fixed blade which is an upwards extension of the colter;
a spring organ which is detachably attached to the colter and which backs up the colter to enable the colter to dodge an obstacle by backing up against the spring organ;
a moving plate attached to and extending the colter toward the blade;
a cover plate in front of the fixed blade;
a mounting space formed between the fixed blade and the cover plate whereby the moving plate is fitted to glide in the mounting space back up towards the fixed blade and then back down, wherein the spring organ includes at least two U-shaped leaf springs, each U-shaped leaf spring extending in a longitudinal direction along the colter and having a U-shape in a cross section parallel to the cutting angle, one leg end of each U-shaped leaf spring being attached to the body and the other leg end being attached to the colter such that the two U-shaped leaf springs together work essentially as straight-through mechanisms to back up the colter.
a body;
a longitudinal colter;
a flexible suspension which suspends the colter to the body such that the colter is in contact with the surface to be ploughed and is set into a tilted cutting angle;
a fixed blade which is an upwards extension of the colter;
a spring organ which is detachably attached to the colter and which backs up the colter to enable the colter to dodge an obstacle by backing up against the spring organ;
a moving plate attached to and extending the colter toward the blade;
a cover plate in front of the fixed blade;
a mounting space formed between the fixed blade and the cover plate whereby the moving plate is fitted to glide in the mounting space back up towards the fixed blade and then back down, wherein the spring organ includes at least two U-shaped leaf springs, each U-shaped leaf spring extending in a longitudinal direction along the colter and having a U-shape in a cross section parallel to the cutting angle, one leg end of each U-shaped leaf spring being attached to the body and the other leg end being attached to the colter such that the two U-shaped leaf springs together work essentially as straight-through mechanisms to back up the colter.
2. A snowplough according to claim 1, wherein the cover plate is immobile relative to the fixed blade and at least partly overlapping with the fixed blade.
3. A snowplough according to claim 1, wherein the moving plate is at least partly overlapping with the fixed blade.
4. A snowplough according to claim 1, further including an additional colter following behind the first-mentioned colter and attached to the colter by a fixing device, and wherein the flexible suspension suspends both said additional and first-mentioned colters-in contact with the surface at the same time.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20041314 | 2004-10-11 | ||
| FI20041314A FI117296B (en) | 2004-10-11 | 2004-10-11 | Suspension of a snow plow cutting element |
| PCT/FI2005/000434 WO2006040396A1 (en) | 2004-10-11 | 2005-10-11 | Blade element mounting in a snow plough |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2584046A1 CA2584046A1 (en) | 2006-04-20 |
| CA2584046C true CA2584046C (en) | 2014-08-19 |
Family
ID=33306015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2584046A Expired - Fee Related CA2584046C (en) | 2004-10-11 | 2005-10-11 | Blade element mounting in a snow plough |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7730641B2 (en) |
| EP (1) | EP1805373B1 (en) |
| CA (1) | CA2584046C (en) |
| FI (1) | FI117296B (en) |
| NO (1) | NO20072429L (en) |
| WO (1) | WO2006040396A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8944176B2 (en) * | 2006-06-01 | 2015-02-03 | Absolute Innovations, Inc. | Implement and method for preparing and maintaining dirt arena footing |
| US8191287B2 (en) * | 2010-03-16 | 2012-06-05 | Winter Equipment Company | Elastomeric plow edge |
| US8844173B2 (en) | 2010-03-16 | 2014-09-30 | Shurtech Brands, Llc | Elastomeric plow edge |
| US9428874B2 (en) | 2010-03-16 | 2016-08-30 | Winter Equipment Company | Elastomeric plow edge |
| US9297131B2 (en) * | 2011-08-31 | 2016-03-29 | Husqvarna Ab | Trailing shield for a snow removal device |
| US20140208621A1 (en) * | 2013-01-31 | 2014-07-31 | Ronald J. Rich | Snow Plow Cutting Edge |
| ITTO20130106A1 (en) * | 2013-02-08 | 2014-08-09 | Giletta Spa | SNOW BLADE |
| FI125842B (en) * | 2014-01-17 | 2016-03-15 | Pajakulma Oy | Snow plow and Snow plow blade bench |
| DE102016121205A1 (en) * | 2016-11-07 | 2018-05-09 | Aebi Schmidt Deutschland Gmbh | Plow |
Family Cites Families (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE881200C (en) * | 1950-08-04 | 1953-06-29 | Josef Peitl | snow plow |
| GB784049A (en) * | 1956-05-02 | 1957-10-02 | Josef Peitl | Snow plough |
| US3014289A (en) * | 1959-01-15 | 1961-12-26 | Anthony J Torrey | Snow plow |
| DE1179975B (en) * | 1962-03-10 | 1964-10-22 | Dr Gottfried Reissinger | Space for snowploughs with a space bar linked to the space |
| AT242736B (en) * | 1964-06-10 | 1965-10-11 | Josef Peitl | snow plow |
| AT269204B (en) * | 1967-05-26 | 1969-03-10 | Anton Kahlbacher | Snow plow attachment |
| DE1929177C3 (en) * | 1969-06-09 | 1978-04-20 | Reissinger, Gottfried, Dr., 8124 St Heinrich | Road clearing device |
| US3712383A (en) * | 1970-10-21 | 1973-01-23 | J Renahan | Plow blade structure |
| US3772803A (en) * | 1972-04-03 | 1973-11-20 | L Cote | Snow plow |
| US3793752A (en) * | 1972-12-29 | 1974-02-26 | Loed Corp | Convertible snow plow with auxiliary ground support |
| US3845577A (en) * | 1973-11-23 | 1974-11-05 | M Naymik | Lightweight snowplow for quick attachment to small vehicle |
| US4176477A (en) * | 1978-03-01 | 1979-12-04 | Arne Farden | Compact unit for excavating, compacting and loading |
| US4307523A (en) * | 1978-12-08 | 1981-12-29 | Harro Reissinger | Street clearing device |
| US4259794A (en) * | 1979-08-30 | 1981-04-07 | C.E.P. Industries Ltd. | Snowplow |
| US4254564A (en) * | 1979-08-30 | 1981-03-10 | C.E.P. Industries Limited | Reversible snowplow attachment |
| DE3205974A1 (en) * | 1982-02-19 | 1983-09-01 | Theodor 7891 Dettighofen Häring | Snowplough |
| DE3205973A1 (en) * | 1982-02-19 | 1983-09-01 | Theodor 7891 Dettighofen Häring | Snowplough |
| DE3225125C1 (en) * | 1982-07-06 | 1988-05-05 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen | Process for welding plating vertical walls |
| DE3319223A1 (en) * | 1983-01-15 | 1984-07-19 | Gummi-Küper GmbH & Co KG, 4630 Bochum | Metal snow-clearing strip |
| US5437113A (en) * | 1994-01-12 | 1995-08-01 | Jones; Daniel K. | Snow plow trip cutting edge |
| US5697172A (en) * | 1995-06-14 | 1997-12-16 | Schmidt Engineering & Equipment, Inc. | Trip edge snowplow |
| US6751894B2 (en) * | 2002-05-30 | 2004-06-22 | Schmidt Engineering And Equipment, Inc. | Snow removal apparatus and method of removing snow |
| US7143531B2 (en) * | 2004-07-02 | 2006-12-05 | Micozzi Albert M | Plow protector |
| US7171770B2 (en) * | 2004-08-25 | 2007-02-06 | Sno-Way International, Inc. | Trip edge snow plow blade |
| US7467485B2 (en) * | 2004-09-28 | 2008-12-23 | Guy Hamel | Inserted knife fortified snowplow blade |
| FI116800B (en) * | 2004-10-11 | 2006-02-28 | Patria Vammas Oy | Wing for a snow plow |
| US7543401B2 (en) * | 2007-08-17 | 2009-06-09 | Doug Hughes | Back drag plow |
-
2004
- 2004-10-11 FI FI20041314A patent/FI117296B/en not_active IP Right Cessation
-
2005
- 2005-10-11 US US11/576,977 patent/US7730641B2/en not_active Expired - Fee Related
- 2005-10-11 WO PCT/FI2005/000434 patent/WO2006040396A1/en active Application Filing
- 2005-10-11 EP EP05800659.4A patent/EP1805373B1/en not_active Expired - Fee Related
- 2005-10-11 CA CA2584046A patent/CA2584046C/en not_active Expired - Fee Related
-
2007
- 2007-05-11 NO NO20072429A patent/NO20072429L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1805373A1 (en) | 2007-07-11 |
| EP1805373A4 (en) | 2009-07-22 |
| EP1805373B1 (en) | 2013-12-25 |
| US20080250675A1 (en) | 2008-10-16 |
| WO2006040396A1 (en) | 2006-04-20 |
| US7730641B2 (en) | 2010-06-08 |
| FI117296B (en) | 2006-08-31 |
| NO20072429L (en) | 2007-07-11 |
| CA2584046A1 (en) | 2006-04-20 |
| FI20041314A0 (en) | 2004-10-11 |
| FI20041314A (en) | 2006-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20151013 |